How would you actually use these? I've been using Hex Workshop to edit the saves (see 'Trainer' thread), but I needed both the line number and the right column since the wrong one could crash it or give weird results.

I'd rather not cheat and mess with the game but i thought i'd just mention some things:

Ear Piece stops screams and songs, Head band gives Guts and Hand mirror prevents petrification. You've also left out some items such as Winged Boots which has the same effect as Wind Boots, High Heels which give Hustle, Red Shoes and Ribbon which i think stop charm, Good Sandles with Regen, God statue which prevents all bad status, Bulky Bible prevents fatal attacks, Potpourri prevents confusion, etc.
Those "#### damage" items reduce the damage of that element by half i think.

This is off the top of my head but i think the rest is correct, feel free to correct me if i've said something wrong =p

Yeah, I know I left some out, was kinda late when I was checking what values gave which items, and for some reason from 19 ( decimal = 25) you get Herb, then various other consumables after that so I didn't mess with it more at that time, I'll check it later on though.

As for doing it with Hex Workshop...

On the toolbar click the "goto"button ( about in the middle by default) and make sure hex is selected as offset, then just type in the hex offset you want to edit from the list.

I'll just provide an example as well to get you started:

Take the address for money, 0000 001c then use goto to get there.
Then you'll have: 30 75 ( depending on what money you had though). In this example I have 30 000 zel, which is 7530 as s hex number.
As you've probably noticed the order is reversed with having 30 before 75, this is due to the order in ehich data are read so keep that in mind.
Just one thing one positions, the "30" in the example above is located at 0000 001c as listed and 75 at the one right after, that goes for pretty much all the offsets.
As for finding hex numbers to put in, you have various calculator as well as web pages that let you do that.

Hopefully that helps a bit )

Edit:
Sorry for the duplicate topics that popped up, no idea what caused them, besides some weird error message on the first attempts at posting.... I've deleted them now though